Science Fair Project Encyclopedia
Ground level power supply
(Redirected from Surface current collection)
Ground level power supply (aka Surface current collection) is a form of third rail pick-up for street tramways.
It is used as an alternative to overhead lines, often for aesthetic reasons, not to be confused with conduit current collection in Washington and parts of London. Ground level power supply, unlike the form of third rail used in subway systems, is street compatible.
Ground level power supply systems use a series of electrically charged rail lengths separated by insulating rail lengths along the length of the track. The charged rails are switched on only when the vehicle is directly above them.
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10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details